CVE-2021-24374Public exploitNetwork attack vector

Unauthenticated comment disclosure via attachment ID tampering

Published Jun 21, 2021 · Updated Aug 3, 2024

Authorization bypass in Automattic Jetpack before 9.8 allows remote attackers to read comments attached to non-public posts and pages. The get_attachment_comments AJAX action accepts a user-controlled id and retrieves comments for that media attachment without checking its parent post's publication status. No authentication or user interaction is required, and exposure is limited to attachment comments associated with unpublished content.

CVSS severity5.3
Medium
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Automattic Jetpack before 9.8 allows remote attackers to read comments attached to non-public posts and pages. The get_attachment_comments AJAX action accepts a user-controlled id and retrieves comments for that media attachment without checking its parent post's publication status. No authentication or user interaction is required, and exposure is limited to attachment comments associated with unpublished content.

The record

CVE
CVE-2021-24374
Published
Jun 21, 2021
Updated
Aug 3, 2024
Vendor
Automattic
Product
Jetpack
Classifications
CWE-639, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.8 <9.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Automattic · Jetpackversion=9.8 <9.8

Published CVSS scores

5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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